4a inlet manifold vs 7a inlet manifold Options

[normality78]

It may sounds abit silly question but i was wondering, does anyone of you guys here did have a look into the differential of 4A and 7A inlet manifold design? I had some discussion with my fren today whom having 7A with 4A inlet head and inlet manifold, i asked him why not opt 7A inlet manifold which he said 4A inlet runner seems to be bigger hence he do think it flow better. what u guys think?

[FallenHero]

not quite sure what you're asking... But the design of the manifolds is what I Think you are talking about. In those terms the manifolds are set up for the engine. 4a (red top) is a high rev, high hp, relatively low torque engine... thus it has big shorter length runners.

7a, being a low rev low hp, higher torque engine, has smaller longer runners.

if you are talking about somehow fitting a 4a manifold onto the runners of a 7a manifold... they don't line up... does not compute, do not pass go.

This post has been edited by FallenHero: Jan 20, 2007 - 9:50 PM